Kraft Paper Manufacturing Machine Underfeed Rewinder
The high-speed underfeed rewinder is a vital finishing machine that transforms paper machine jumbo rolls into saleable parent rolls of exact width and density. This paper mill plant machinery adopts an underfeed configuration, which provides excellent web stability and reduces dust generation compared to top-feed systems. The high-speed underfeed rewinder’s unwind stand features a pneumatically actuated braking system that ensures consistent braking torque even during prolonged high-speed operation.
Inside the high-speed underfeed rewinder, a precision slitter assembly holds multiple upper circular knives that engage with a long-life bottom blade roll, each knife independently adjustable for quick setup changes. Hydraulic cylinders control the pressure between the finished roll and the support rollers, automatically adjusting nip load as the roll diameter grows to maintain uniform hardness from core to surface. The high-speed underfeed rewinder also includes a hydraulic paper pushing device that ejects completed rolls, minimizing operator intervention. With its heavy-duty welded frame and vibration-damping design, this high-speed underfeed rewinder handles high inertia loads with ease, making it ideal for heavyweight paper and board mills.
Main Specifications – High-Speed Underfeed Rewinde
| Parameter | Value |
|---|---|
| Paper Grades | Kraft paper, board, corrugated medium |
| Basis Weight Range | 200 – 600 g/m² |
| Net Paper Width | 2200 mm |
| Unwind Max Diameter | 2000 mm |
| Rewind Max Diameter | 1500 mm |
| Design Speed | 500 m/min |
| Working Speed | 600 m/min |
| Paper Feed Speed | 25 m/min |
| Unwind Type | Underfeed |
| Support Roller Diameter | 500 mm × 2 |
| Slitting Method | Pneumatic upper knives + bottom blade roll |
| Top Knife Diameter | 150 mm |
| Bottom Knife Diameter | 280 mm |
| Main Drive Power | 45 kW |
| Hydraulic System | Integrated with pressure control |
| Pneumatic System | Complete control panel with manual rotary valves |
| Dynamic Balance Standard | G2.5 |
Leizhan offers a complete range of high-speed underfeed rewinder systems for turnkey paper production lines and retrofit projects. Our high-speed underfeed rewinder combines rugged construction, precise hydraulic and pneumatic control, and user-friendly operation to deliver consistent roll quality and high uptime. From engineering design to installation and after-sales support, Leizhan ensures your high-speed underfeed rewinder performs at its best. To discuss your high-speed underfeed rewinder requirements or schedule a factory visit, please email leizhanworld@gmail.com.